pyrone

American  

[pahy-rohn, pahy-rohn] / ˈpaɪ roʊn, paɪˈroʊn /

noun

Chemistry.

1. either of two heterocyclic ketones having the formula C 5 H 4 O 2 .

---

pyrone British  

/ ˈpaɪrəʊn, paɪˈrəʊn /

noun

1. either of two heterocyclic compounds that have a ring containing five carbon atoms and one oxygen atom with two double bonds and a second oxygen atom attached to a carbon atom in either the ortho -position ( alpha pyrone ) or the para -position ( gamma pyrone )

2. any one of a class of compounds that are substituted derivatives of a pyrone

---

Etymology

Origin of pyrone

First recorded in 1890–95; pyr- + -one